Improve parsing, regex, and test consistency

Refines regex patterns for URL rewriting and authentication parsing, ensures parseInt uses radix 10 throughout, and updates test mocks and helpers for consistency. Also adds more global variables to ESLint config, improves error handling, and removes unused code in tests.

eslint.config.js

@@ -19,6 +19,19 @@ export default [
         URL: 'readonly',
         URLSearchParams: 'readonly',
         console: 'readonly',
+        AbortController: 'readonly',
+        AbortSignal: 'readonly',
+        setTimeout: 'readonly',
+        clearTimeout: 'readonly',
+        setInterval: 'readonly',
+        clearInterval: 'readonly',
+        ReadableStream: 'readonly',
+        WritableStream: 'readonly',
+        TransformStream: 'readonly',
+        TextEncoder: 'readonly',
+        TextDecoder: 'readonly',
+        performance: 'readonly',
+        globalThis: 'readonly',
 
         // Vitest globals
         describe: 'readonly',